title: Equilibrium partitioning theory to predict the sediment toxicity of the anionic surfactant C(12)-2-LAS to Corophium volutator.
abstract: The study of the effect of the sorption of linear alkylbenzene sulfonates (LAS) on the bioavailability to marine benthic organisms is essential to refine the environmental risk assessment of these compounds. According to the equilibrium partitioning theory (EqP), the effect concentration in water-only exposure will be similar to the effect concentration in the sediment pore water. In this work, sorption and desorption experiments with two marine sediments were carried out using the compound C(12)-2-LAS. The effect of the sediment sorption on the toxicity of benthic organisms was studied in water-only and in sediment bioassays with the marine mud shrimp Corophium volutator. In addition, three common spiking methods were tested for its application in the toxicity tests, as well as the stability of the surfactant during the water-only and sediment-water test duration. LC50 values obtained from water-only exposure showed a good correspondence with the pore water concentrations calculated from the sorption and desorption isotherms in the spiked sediments.
authors.affiliation: Institute for Risk Assessment Sciences, Utrecht University, Yalelaan 2, 3508 TD, Utrecht, The Netherlands. a.ricorico@uu.nl
authors.forename: Angeles
authors.initials: A
authors.lastname: Rico-Rico
authors.forename: Ali
authors.initials: A
authors.lastname: Temara
authors.forename: Joop L M
authors.initials: JL
authors.lastname: Hermens
mesh_terms: D017738:Alkanesulfonic Acids / Q000493:pharmacokinetics / Q000633:toxicity*; D033304:Amphipoda / Q000187:drug effects* / Q000378:metabolism; D000818:Animals; D001682:Biological Availability; D004305:Dose-Response Relationship, Drug; D004784:Environmental Monitoring / Q000379:methods; D019015:Geologic Sediments / Q000737:chemistry*; D007928:Lethal Dose 50; D018570:Risk Assessment / Q000379:methods; D013501:Surface-Active Agents / Q000493:pharmacokinetics / Q000633:toxicity*; D018675:Toxicity Tests / Q000379:methods; D014874:Water Pollutants, Chemical / Q000493:pharmacokinetics / Q000633:toxicity*
chemical_list: D017738:Alkanesulfonic Acids; D013501:Surface-Active Agents; D014874:Water Pollutants, Chemical; C030641:alkylbenzyl sulfonic acid